在MFC项目中发现内存泄漏的问题 [英] Problems finding memory leaks in MFC project

问题描述

我有一个现在很大的MFC SDI项目.我需要使用Visual Studio检查内存泄漏.我已经阅读了许多文章中推荐的代码.

因此，在我要检查的源文件的顶部，我添加了:

I have an MFC SDI project that is quite big now. I need to check for memory leaks using Visual Studio. I have put in the code recommended in lots of articles I have read.

So, at the top of the source file that i want to check, I have added:

#define _CRTDBG_MAP_ALLOC
#include <stdlib.h>
#include <crtdbg.h>

因为我想在报告泄漏的行上获取一些信息，这将使我能够在源代码中找到发生泄漏的点，所以我已经提出:

as I want to get some info on the line that reports the leak that will allow me to find the point in the source code where he leak occurs I have put:

#ifdef _DEBUG
   #ifndef DBG_NEW
      #define DBG_NEW new ( _NORMAL_BLOCK , __FILE__ , __LINE__ )
      #define new DBG_NEW
   #endif
#endif">

现在，当我进行编译时，在链接阶段我得到:

myfile.obj LNK2005:"void __cdecl运算符删除(void * .... etc.
已在uafxcwd.lib(afxmem.obj)中定义
myapp.exe:致命错误LNK 1169:已定义一个或多个乘法定义的符号.

有人可以告诉我如何在MFC项目中查找内存泄漏-似乎已经定义的内容与我要添加的内容之间存在冲突.我已经阅读了所有可以找到的内容，但还没有更明智(并且很沮丧:().

now when I compile, at the linking stage I get:

myfile.obj LNK2005: "void __cdecl operator delet(void* ....etc.
already defined in uafxcwd.lib (afxmem.obj)
myapp.exe: fatal error LNK 1169: one or more multiply defined symbols defined.

Could somebody please tell me how to find memory leaks in an MFC project - it seems like there is a conflict bteween things that are already defined and what I am trying to add. I have read all that I can find but am no wiser yet (and am very frustrated :( ).

推荐答案

您可以使用类似以下内容的内容:

You can use something like :

#include <string.h>
#include <malloc.h>
#include <crtdbg.h>

int main( )
{
        char *p1, *p2;
        int tmpDbgFlag;

        _CrtSetReportMode( _CRT_ERROR, _CRTDBG_MODE_FILE );
        _CrtSetReportFile( _CRT_ERROR, _CRTDBG_FILE_STDERR );
        /*
         * Set the debug-heap flag to keep freed blocks in the
         * heap's linked list - This will allow us to catch any
         * inadvertent use of freed memory
         */
        tmpDbgFlag = _CrtSetDbgFlag(_CRTDBG_REPORT_FLAG);
        tmpDbgFlag |= _CRTDBG_DELAY_FREE_MEM_DF;
        tmpDbgFlag |= _CRTDBG_LEAK_CHECK_DF;
        _CrtSetDbgFlag(tmpDbgFlag);
.....
}

此外，您将有助于查看以下链接:
http://msdn.microsoft.com/en-us/library/1y71x448％28v = vs.71％29.aspx [ ^ ]
http://mariusbancila.ro/blog/2010 /07/12/how-to-find-the-source-of-memory-leaks/ [内存泄漏检测 [ http://msdn.microsoft.com/en-us/library/c99kz476％28v = vs.80％29.aspx [ ^ ]
http://msdn.microsoft.com/en-us/library/x98tx3cf％28v = vs.71％29.aspx [ ^ ]

In addition you will be helpful to review the following links:
http://msdn.microsoft.com/en-us/library/1y71x448%28v=vs.71%29.aspx[^]
http://mariusbancila.ro/blog/2010/07/12/how-to-find-the-source-of-memory-leaks/[^]
Memory Leak Detection[^]
http://msdn.microsoft.com/en-us/library/c99kz476%28v=vs.80%29.aspx[^]
http://msdn.microsoft.com/en-us/library/x98tx3cf%28v=vs.71%29.aspx[^]

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